@inproceedings{ShYi2001, author = {Nikolay Shilov and Kwangkeun Yi}, title = {On Expressive Power of Second Order Propositional Program Logics}, booktitle = {A. Ershov 4th International Conference on Perspectives of System Informatics}, address = {Novosibrisk, Russia}, month = {July}, year = {2001}, format = {ps.gz}, category = {conference program-logics}, }